Mixing-valve.



D. W. MCNEH..

MIXING VALVE.

APPLlcATloN FILED SEPT. e, 191s.

l 9 18292871 Patented May 9, 1916.

m Wm \l I 4inviarti) STATES PATENT ortica` DANIEL `W. MGNEIL, OFHCINCINNATI,`-OHIO,`ASSIGNOR TO THE JOHN DOUGLAS COMPANY, 0F CINCINNATI, OHIO, A'CORPORATION OF OHIO.

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Application led September 6, 1913. Serial No. 788,380.

To all 'whom t may concern: i

Be it known that I, DANIEL W'. MGNEIL, a citizen of the United States of America, and resident of Cincinnati, county of Hamilton, and State of Ohiohave invented certain new and useful Improvements in MiX-\ The object'of `.my invention is a valve of` simplied construction. i

In `the accompanying drawings, Figure l is a vertical central sectional `'view ofa valve embodying my invention, taken upon line l-l of Fig. 5. Fig. 2 is a detail sectional view taken upon the same line as Fig. 1, but showing the valve in position for supplying cold water. Fig. 3 is a `sectional view taken upon line 3 3 of Fig. 2, and showing the valve in position for supplying warmk water. Fig. .tis a viefw similar to Fig. 2, but showing the valve in position for sup-` plying hot water. Fig. 5 isa plan view of the valve.

Housing A is divided by diaphragme a, a', into a mixing chamber B, a cold water chamber D, and a hot water chamber E, the aforesaid chambers being `located in alinenient with each other.

Mixing chamber B has an exit port b, cold water chamber D has anadmission `port d, and hot water chamber `E has an admission port e. The ports b and d are formed upon the sides of the housing A, and the admission porte is formed in the bottom a2 thereof. The ports d and o have surrounding them annular internally screw-threaded extensions of the housing, to be connected to the cold water and the discharge pipes, respectively. The housing has upon its side an L-shaped passagaleading' from :the admission port e to the screw threaded connection e of the hot water pipe, this arrangement being madey for the purpose of symmetry, in order'toplace the hot :and cold water pipes f diametrically opp 'site each other. Diaphragms a. df', have fgrforations in alinement with the admission port c, the perforation in diaphragm a forming a port between the mixing chamber and the cold water chamber, and being surrounded/'by an Specification of Letters Patent.

annular` valve seat a3, and the porte being .surrounded with an annular valve seat a4.

The valve stein consistsof four parts: an actuating part F, having screw threaded connection with the part f, which carries the mixing valve f; the hollow part f2,

which contains `the passage for connecting the hot water chamber E and the mixing chamber; andthe valve f3, for regulating the admission of hot water to the hot water chamber E. i f- Y The part f3 of the stem has a cylindrical portion f, which forms a plug adapted to contact with the walls of the port e. This portionr f4 `is madeof a length, such that it takes a quarterturn of the valve stem F to carry the portion f above the port e. Thus cold water is admitted to the mixing chamber throughfthe port, between the mixing and cold Water chambers, before hot water.,v

is admitted. to the hotwater chamber E.

The portion f2 of the valve stem has cylindrical walls f5, which Contact the wallsof the perforation in diaphragm a snugly in all positions of the valve stem. The cylindrical portion f5 is of a length greater; than the height of the cold water chamber, so ask to extend thereacross and to enter theVV Patented May 9', 'ioia the valve stem in four separate parts,4 F,

f, f2, f3, for convenience ofmanufaoture.`

will now describe the opeation'of my mixing valve.

When the valve is in its closed position, valves f and )"8k contact respectively with valve seats a3 and a4. VIn this position index linger F of the actuating handle points to the word Shut uponthe annular flange G on the valve housing, this `valve being secured to the housing by means of a set screw, q

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'Y portiony f* of the valve stem is still 'Within phragm o, into themixing chamber.v The the port e, so that hot water may not enter the valve housing. Cold water will, therefore, be discharged through the discharge pipe If the handle be moved past the first quarter of its revolution, the portion f4 of the valve stem will be raised past the walls of the inlet e, and hot water will then low into the hotwater chamber E, thence through the perforations f, the hollow portion f2, and the perforations f1,to commingle with the cold water entering the mixing chamber. The greater the amount the valve stem is raised, the Ygreater the amounty ot' hotwater admitted to the. mixing chamber in proportion tothe cold water, so that the degree of warmth of the water may `be varied by varying the position of the index finger F between the words Cold and lVarm upon the ange G. By givingfur Y ther rotation to the valve stem, it is carried upward, so that theparts assume the positionpshownY in F ig. eL, whereinthe cylindrical portion f5 of the stem enters the port in the diaphragm a, thus 'c1osing'-ol` the Y mixing chamber from the cold Vwater chamted to the valve housing. it is seen that there is no danger ot a person becoming scalded by having hot water ejected from the valve, when it is first opened,'and since the handle must be moved a quarter of a revolution before any hot, water is admitted to the mixing chamber, the probabilities of a person scalding himself is rendered still more remote;

What I claim is:`

1. A mixing valve consisting of a housing having diaphragms dividing 4it into three alined chambers, which constitute a mixing chamber, a cold waterchamber, and a hot water chamber, the diaphragms being perforated, and the housing being perforated to form an admission port to the hot water chamber, an admission port to the cold V,water chamber, and an exit fromthe mixingchamber, a' hollow valve 'stem pass ingthrough the perforations in the diaphragms closing the port between the cold and hot water chambers and connecting theV hotl water chamber with the mixing cham- -ber bv its interior passage, a' valve upon the valve stem adapted to regulate the opening of the admission port of the hot water chamber. and a second valve upon the valve stem adapted to open the port between the cold water and the mixing chambers in advance of the openingT of the hot water port.

2. In a mixing valve` the combination of a housing having two horizontal diaphragms, concentric ports in the diaphragms and the bottomof the housing, the diaphragms dividing the housing into a mixing chamber, a. cold water chamber, and a hot Water chamber, a hollow` valve stem extending i' through the ports in the diaphragms and tact'with the'walls'ofV the perforations ofthe diaphragm between the hot water cham-` ber andthe cold water chamber, and adapt-v ed toclose the opening in the diaphragm between the cold water and the mixing chambers in the uppermost position of the valve, the interior passage of valve stem connecting the hot water chamber with, the mixing chamber, and the valve upon the valve stem adapted to seat upon the diaphragm between the mixing chamber and the cold water chamber. i

3. A mixing valve having a housing with diaphragms dividing it into a mixing chamber, a cold water chamber, and a hot water chamber,.the diaphragms having pertorations putting the mixing chamber into communication with the cold water chamber, and .thefcold water chamber into communir-,ation with the hot water chamber, the housing having admission ports to the mixing chamber, .the cold water chamber, and the hot water chamber, a valve stem extending through the ports in the diaphragms and having anenlarg'ed portion adaptedto keep the porty between the cold water chamber and the hot water chamberV closed, and in its uppermost position to close the-port between the mixing chamber and the cold water chamber, and having an internal passage adapted to place the hot w-ater chamber into communication with the mixing chamber a'nd to direct the hot water transversely of the iiow of cold water into the'mixing chamber.v whereby the hot and cold water will be mixed.

4. In a mixing valve, the Lcombination of a housing,1havinga mixing chamber, a cold water chamber, and a hot water chamber formed thereima ported diaphragm formed in said housing between said mixing and '.cold water Vchambers andlhaving a valve asl adapted to close the port in the last mentioned diaphragm when seid Valves are closed. i

In testimony whereof, l have hereunto subscribed my nume this 3rd day of September, 1918.

DANIEL W. MGNEIL.

Witnesses:

WV. THORNTON BoGERT, B. R. KROPF.

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